I ran one 2000 Honda in my earlier pickup camper but with air conditioning I had to buy a second and wire them together. Ran them to power part of my house when we had a tornado the took out the power in our little town for 8 days. They have been working part time for 20 years. Carry one now in my 37 Foot Winnebago Motor Home and have it for backup. The new air conditioners can be equiped with a soft start and run on one 2000 watt unit. Yamaha may be as good but why take a chance for about the sam money. Such a good product.